JP6753228B2 - Lens prescription assistance program - Google Patents

Description

The present disclosure relates to lenses formulation auxiliary program for assisting the prescription glasses based on eye results.

Conventionally, various simulations of the appearance of the eye to be inspected have been proposed by using the wavefront aberration data of the eye to be inspected. For example, Patent Document 1 by the Applicant discloses an apparatus for deriving and displaying the spatial frequency characteristics (MTF) of an eye to be inspected assuming that a corrective lens is worn, based on at least the naked eye wavefront aberration data. ..

Japanese Unexamined Patent Publication No. 2016-734777

Although MTF is information that correlates with contrast sensitivity, it is difficult for the examiner and the examinee to grasp how much visual acuity the subject has. Therefore, the present inventor has studied a display method for allowing the examiner and the examinee to easily understand the contrast sensitivity of the eye to be inspected to which the corrective lens is prescribed.

The present disclosure has been made based on at least one of the above circumstances, the examiner and an object thereof is to provide a formulation ease put lens formulation auxiliary program more suitably corrective lenses.

The lens prescription auxiliary program according to the second aspect of the present disclosure is executed by a computer processor to acquire the naked eye wave surface aberration data of the eye to be inspected measured by the wave surface sensor, and is predetermined in predetermined degree increments. The corrected wave surface aberration data of the eye to be inspected assuming the prescription of the correction lens having any of the plurality of corrected powers is calculated based on the naked eye wave surface aberration data, and further, the spatial frequency characteristic based on the corrected wave surface aberration data. A calculation step for obtaining the corrected contrast vision, which is the contrast vision of the eye to be examined reflecting the correction power, for each magnitude of contrast, and a display for displaying information indicating the corrected contrast vision for each magnitude of contrast on the monitor. Have the computer perform the control steps.

The present disclosure has the effect that the examiner can more preferably prescribe the corrective lens.

It is a schematic diagram which showed the outline of the lens prescription assisting apparatus which concerns on this disclosure. It is a figure which showed the basic information report in an Example. It is a figure which showed the simulation report in an Example. It is a figure which showed the eye view report in an Example.

Hereinafter, the present disclosure will be described based on the embodiments.
First, with reference to FIG. 1, the outline of the lens prescription assisting device (hereinafter, referred to as “this device”) 1 according to the embodiment will be described. The present device 1 is a computer, and the lens prescription auxiliary program according to the present embodiment is executed by the processor.

When the lens prescription assistance program is executed, the apparatus 1 presents useful information for lens prescription to the examiner and the subject by three reports. The three reports provide at least simulation information showing how they look in the eye under test and information showing the characteristics of the eye under test. In the following description, the three reports will be referred to as "basic information report", "simulation report", and "eye view report" for convenience. The apparatus 1 may selectively display one of the three reports on the monitor.

In the following embodiment, a case where the present device 1 performs a display for prescribing a spectacle lens which is a kind of a correction lens will be described. However, the present invention is not necessarily limited to this, and the present device 1 can also be used for prescribing contact lenses.

The apparatus 1 has at least a control unit (processor of the apparatus 1) 30 and a memory 31. The control unit 30 controls various arithmetic processes in the present device 1, control of each unit, display control of various reports, and the like.

In this embodiment, the lens prescription auxiliary program may be stored in the memory 31 in advance. Further, in another embodiment, instead of the memory 31, it may be stored in advance in a storage medium (for example, a flash memory, an external hard disk, etc., which is not shown) that can be attached to and detached from the apparatus 1. ..

Further, the memory 31 may store information regarding the characteristics of the eye to be inspected. Information on the characteristics of the eye to be inspected includes, for example, various measurement results by the eye examination device, various imaging results of the eye to be inspected, and the like. The control unit 30 displays these measurement results, shooting results, or the results of further processing of them in each report.

The monitor 50 on which each report is displayed may be pre-installed in the apparatus 1 or may be a separate monitor 50.

The device 1 may be a separate device from the optometry device, or may be an integral device. The present device 1 of the embodiment is integrated with a wavefront sensor which is an example of an eye examination device, and has a measurement optical system 100 for measuring naked eye wavefront aberration data (a kind of refraction information) of the eye to be inspected. .. The naked eye wavefront aberration data may be data showing the distribution of wavefront aberration in the eye to be inspected (referred to as wavefront aberration distribution data).
The device 1 may be a device integrated with a subjective inspection device. Further, when the present device 1 is a separate device, the present device 1 may have a configuration of a general-purpose computer such as a PC or a tablet. In this case, the present device 1 may directly acquire various information (including acquisition of simulation information showing the appearance of the eye to be inspected and information showing the characteristics of the eye to be inspected, which will be described later) from the inspector. It may be obtained from other devices connected by a network.

Further, the present device 1 may be a server (for example, a cloud server) connected to the optometry device and the client terminal placed in the optician store via a network.

The measurement optical system 100 may be, for example, a phase difference type wavefront sensor, a wavefront sensor using a Shack-Hartmann sensor, or a Talbot type wavefront sensor (for details, see Japanese Patent Application Laid-Open No. 2006-149871). In the phase difference type wavefront sensor, a slit light flux is projected on the fundus, and a phase difference signal is output when the reflected light flux is detected by a light receiving element (for example, Japanese Patent Application Laid-Open No. 10-1088337 by the present applicant). reference).

The apparatus 1 according to the embodiment has a wavefront sensor for a phase difference signal as the measurement optical system 100. In the phase difference method, as a result of processing the phase difference signal, distribution data of the refraction degree (that is, the refraction error from the emmetropic eye) in the eye to be inspected is obtained. Then, the distribution data of the refractive index is converted into the distribution data of the wavefront aberration. The wavefront aberration distribution data is an example of information on the refraction of the entire eye to be inspected, which is equivalent to data expressed in the form of refractive power such as refractive power distribution data.

The apparatus 1 may further have a corneal shape measuring optical system 100 such as a keratometer or a topographer. The corneal shape measurement optical system 100 may be configured to project an index luminous flux such as myring or placid ring and capture an index image formed on the cornea as a frontal image of the anterior segment of the eye, or a cross section of the cornea in a plurality of meridian directions. It may be configured to take an image. The control unit 30 acquires corneal shape data by appropriately processing the frontal image of the anterior segment of the eye or a plurality of cross-sectional images of the cornea.

Further, the present device 1 may have an anterior segment camera (not shown) that captures an image of the anterior segment including the pupil portion of the eye to be inspected. From the anterior segment image, for example, the pupil diameter of the eye to be inspected can be measured. Such an anterior segment camera may have a configuration capable of capturing images by switching the amount of illumination light. For example, images of the anterior segment of the eye to be inspected may be captured in each of photopic vision (daytime) and mesopic vision (nighttime). In this case, the apparatus 1 can adjust the illumination light source output to the first illumination light amount for photopic vision photography and the second illumination light amount for twilight vision photography which is smaller than the first illumination light amount. You may. Further, the present device 1 may be capable of capturing a transilluminated image of the eye to be inspected by using the anterior segment camera.

Next, with reference to FIGS. 2 to 4, three reports (basic information report, simulation report, and eye view report) displayed on the monitor 50 by the present apparatus 1 will be described in detail. As described above, in this embodiment, one of the three reports is selectively displayed on the monitor 50 on the monitor 50.

Each report contains a variety of information. Specifically, any one of simulation information showing the appearance in the eye to be inspected, information showing the characteristics of the eye to be inspected, and the like is included.

The information indicating the characteristics of the eye to be inspected includes at least the information indicating the characteristics of the eyeball optical system, which is the measurement result of the eye to be inspected by the optometry apparatus. Further, a photographed image of the eye to be inspected showing the characteristics of the eyeball optical system may be further included. Specific examples of the measurement results of the eye to be inspected by the optometry device include information on the refraction of the entire eye to be inspected, information on the shape of the cornea, and the like.

Here, as the information regarding the refraction of the entire eye to be inspected, the above-mentioned wavefront aberration distribution data of the eye to be inspected (may be in the form of the distribution data of the refractive power) may be included. Information about the wavefront aberration distribution data may be shown as a two-dimensional map or as a numerical value. In the basic information report, a two-dimensional map and a numerical value related to the map (that is, a numerical value related to the aberration of the eye to be inspected) may be shown in association with each other. This value may be calculated based on the wavefront aberration distribution data corresponding to each position on the pupil. Numerical values may be expressed in the form of refractive power (including the case of refractive power), for example, S (spherical power) and C (pillar surface) in consideration of wavefront aberration distribution data corresponding to each position on the pupil. It may be each value of (frequency) and A (astigmatic axis angle). Further, the higher-order aberration component in the entire eye to be inspected may be quantified.

The refraction information of the entire eye to be inspected shown in each report in the present device 1 is at least the information obtained based on the distance measurement. In addition to this, the apparatus 1 acquires the refraction information of the entire eye to be inspected obtained by the measurement in the state where the adjustment load is applied to the eye to be inspected, and displays the refraction information at the time of the adjustment load in each report. You may. In addition, simulation information (details will be described later) is generated based on the refraction information at the time of adjustment load, and is displayed in one of the reports together with the simulation information based on the refraction information at the time of distance measurement or by switching one by one. You may let me.

The information on the shape of the cornea includes at least one of information on the curvature of the cornea surface, information on the surface of the cornea (height difference with respect to the approximate spherical surface of the cornea), information on the refractive distribution in the cornea, information on the cross-sectional shape of the cornea, and the like. This information may be shown as a two-dimensional map or as a numerical value.

The simulation information is information that graphically indicates the appearance of the eye to be inspected, which is estimated based on the refraction information of the entire eye to be inspected. The simulation information may be information indicating the appearance with the naked eye, or may be information indicating the appearance in the corrected state.

The simulation information is generated, for example, based on information about the refraction of the entire eye to be inspected. Specific examples of simulation information include a simulation image of an optotype image formed on the fundus surface, and a change in the appearance of the eye to be inspected when certain conditions change (“change in appearance” is “change in appearance quality”. It may be a figure or a graph showing the simulation result. The simulation image of the optotype image may be, for example, an image (hereinafter referred to as a PSF image) showing the point spread function (PSF) on the bottom surface of the eye, or the subjective examination optotype. It may be an image showing how it looks.

In each report, as for the information that changes between the daytime and the nighttime, both the daytime information and the nighttime information may be displayed at the same time. Further, either the information in the daytime or the information in the nighttime may be selectively displayed. In this case, the information in the daytime and the information in the nighttime may be switched and displayed based on a predetermined operation input. By displaying both the daytime information and the nighttime information, the information that changes between daytime and nighttime information The difference in eye condition between daytime and nighttime However, it becomes easier for the examiner or the subject to grasp. Therefore, such a display is useful for the examiner to propose the prescription of the spectacles for nighttime to the subject in the case of an eye having a large difference in the state between the daytime and the nighttime.

The pupil diameter changes between daytime and nighttime, and the information on the refraction of the entire eye also changes as the pupil diameter changes. Therefore, specific examples of the information that changes between the daytime and the nighttime include information on the pupil diameter and the refraction of the entire eye, as well as simulation information, anterior segment image, and the like.

In each report, information for each of the left and right eyes may be displayed at the same time. In this case, the information about the right eye and the information about the left eye may be arranged on the left and right separately on the screen.

Further, in the present device 1, the position information of the spectacle lens may be shown in any of the reports.

The position information of the spectacle lens is information regarding the position where the spectacle lens is arranged with respect to the eye to be inspected or the face of the subject. Specific examples of the position information include PD (pupillary distance: distance between the left and right eyes), VD (distance between corneal apex: distance from the corneal apex to the posterior surface of the spectacle lens), and the like. Each position information may be an actually measured value.

<Basic information report>
Of the three reports, the basic information report will be explained first. The basic information report is mainly composed of two or more types of eye optical system information. It is preferable that the basic information report exclusively summarizes the information to be provided to the examiner. More specifically, it is preferable that the basic information report at least aggregates various information used for lens prescription among information on the characteristics of the eye to be inspected. Further, in the basic information report in the present embodiment, the position information of the spectacle lens is also summarized.

It is preferable that the basic information report includes at least information on the refraction of the entire eye to be inspected as information on the characteristics of the eye to be inspected. Further, the information on the corneal shape may include the anterior segment frontal images 201a to 201d of the eye to be inspected, the transillumination images 202a and 202b, the pupil diameter and the like as information on the characteristics of the eye to be inspected.

In the basic information report of FIG. 2, the refraction distribution maps 204a to 204d of the eye to be inspected are displayed as one of the refraction information of the eye to be inspected. It is a map showing the degree of refraction (refraction error) at each position on the pupil. As shown in FIG. 2, the refraction distribution maps 204a to 204d are superimposed and displayed in the pupil of the anterior segment frontal images 201a to 201d. In this embodiment, the refraction distribution maps 204a to 204d can be derived as the processing result of the phase difference signal output from the measurement optical system 100. In this embodiment, the refraction distribution maps 204a to 204d are displayed according to the selection operation of the button 203. When a corrective lens is prescribed, the examiner can be made to grasp whether or not the eye is likely to improve the appearance by using the refractive index distribution maps 204a to 204d.

In FIG. 2, each value of S, C, and A (“WF ref value” in FIG. 2) based on the wavefront aberration distribution data corresponding to each position on the pupil in association with the refractive index distribution maps 204a to 204d, and , Values indicating higher-order aberration components are displayed respectively. The WF lev value can be used as an initial value for a subjective test. In addition, the larger the value of the higher-order aberration, the more difficult it is for the examiner to understand that the visual acuity is less likely to be improved even if the correction is made with the spectacle lens. The WF lev value and the higher-order aberration value do not necessarily have to be displayed at the same time, and only one of them may be displayed.

Further, in FIG. 2, the “lev value” is further displayed in association with the refractive index distribution maps 204a to 204d. The "lev value" referred to in this embodiment represents the degree of refraction (refraction error) in a part of the pupil (specifically, a ring-shaped region having a predetermined radius) by each value of S, C, and A. ing. The "lev value" is derived by obtaining the degree of refraction from the phase difference signal in the ring-shaped region having a predetermined radius. In this embodiment, the "lev value" is a reference value. It is considered that the WF lev value is closer to the final prescription value because the aberration at each position of the eye to be inspected is taken into consideration.

Further, in FIG. 2, the pupil diameter and the pupil deviation are shown in association with the anterior segment frontal images 201a to 201d. The pupil deviation indicates the amount of deviation between the measurement axis and the center of the pupil. The value of the pupillary deviation is used, for example, to correct the interpupillary distance PD.

In addition, the pupil diameter changes between daytime and nighttime, and the refraction information of the entire eye also changes as the pupil diameter changes. Therefore, in the basic information report, as for the information regarding the refraction of the entire eye to be inspected, both the information in the daytime and the information in the nighttime are displayed at the same time. In this case, the information in the daytime and the information in the nighttime may be displayed separately in different areas on the screen. As an example, in FIG. 2, information on the refraction of the entire eye to be inspected in the daytime and information on the refraction of the entire eye to be inspected in the nighttime are displayed separately at the top and bottom of the screen.

Further, in this embodiment, the values of the WF lev values (each value of S, C, and A in consideration of the wavefront aberration distribution data corresponding to each position on the pupil) are the values in the daytime and the values in the nighttime. The difference is displayed. In an eye to be inspected that has been corrected based on the degree of refraction during the daytime, the larger the difference, the more likely it is that the corrected value will reduce the appearance at nighttime. In this embodiment, the above difference is displayed in association with the refractive index distribution maps 204b and 204d at night.

In the basic information report of FIG. 2, as information on the corneal shape, the corneal curvature, the aberration in the cornea, the diameter (diameter or radius) of the cornea, the corneal curvature maps 205a, 205b, and the like are displayed. In FIG. 2, these information are collectively displayed at the upper part of the screen.

Further, in FIG. 2, the main meridians of the cornea are superimposed and displayed on the corneal curvature maps 205a and 205b. For example, corneal curvature is utilized to prescribe contact lenses. In addition, the corneal curvature map makes it possible for the examiner to easily grasp the suspicion of corneal shape abnormality such as keratoconus. Further, the corneal curvature maps 205a and 205b are useful for the examiner to grasp, for example, whether or not the astigmatic component in the lev value is derived from the cornea. In the basic information report of FIG. 2, the transillumination image 202a , 202b is displayed. When turbidity is confirmed in the transilluminated images 202a and 202b, it is possible to make the examiner understand that the visual acuity is difficult to improve due to the opacity even if the spectacle lens is corrected. In FIG. 2, the transilluminated images 202a and 202b are collectively displayed at the upper part of the screen.

In FIG. 2, the information on the corneal shape and the transillumination images 202a and 202b each represent the degree of components of the ocular optical system information that cannot be corrected by the prescription of the corrective lens by numerical values or images. With this information, it is possible for the examiner to know whether or not the eye is likely to improve the appearance when the corrective lens is prescribed.

In particular, in FIG. 2, the information on the corneal shape and the transillumination images 202a and 202b are displayed separately (in separate regions) from the information on the refraction of the entire eye to be inspected. For this reason, information on the refraction of the entire eye to be inspected, which is directly used in the prescription of eyeglasses and subjective examination, and reference information for advancing the examination (for example, information on the shape of the cornea, and the transillumination image 202a). ) And can be easily distinguished by the examiner.

Further, in FIG. 2, since the information on the corneal shape and the transillumination images 202a and 202b are displayed side by side, whether or not the eye can easily improve the appearance when a corrective lens is prescribed. It is easier for the examiner to understand whether or not.

Further, in the basic information report of FIG. 2, information on the characteristics of the eye to be inspected is displayed simultaneously for the left and right eyes. More specifically, information on the characteristics of the eye to be inspected for each of the left and right eyes is displayed separately on the left and right sides of the screen. As a result, the examiner can easily grasp whether or not the anisometropia is present.

In the basic information report of FIG. 2, the interpupillary distance PD and the corneal apex distance VD are displayed as the position information of the spectacle lens. These values are referred to as the interpupillary distance PD in determining the lens center with respect to the spectacle frame. Further, the distance VD between the corneal vertices is referred to in obtaining simulation information at the time of correction.

<Simulation report>
The simulation report is mainly composed of simulation information.

The simulation report may include, for example, a simulation image of an optotype image as simulation information, or may include a predictive test result of a subjective test. The predictive test result may be one that predicts the result in the middle of the test in the subjective test, or may be one that predicts the final subjective prescription value.

For example, as shown in FIG. 3, simulation images 301a to 301d showing how the optotype for subjective examination looks may be shown in the simulation report. The visual acuity test target may be any of a visual acuity test target, an astigmatism target, a screening target, and the like. In FIG. 3, the visual acuity test index is shown as simulation images 301a to 301d. As shown in FIG. 3, the visual acuity test target may be displayed together with the visual acuity value corresponding to the visual acuity value. This allows the examiner to infer the eyesight of the subject. In addition, in FIG. 3, how to see three kinds of predetermined visual acuity values (more specifically, 20/100, 20/40, 20/20) is shown in each of the simulation images 301a to 301d. ..

In the simulation report, a PSF image, which is a simulation image of the point spread, may be shown instead of the target for the subjective test or together with the target for the subjective test. In the example of FIG. 3, a mode in which an optotype for a subjective test is displayed in a simulation report and a mode in which a PSF image is displayed in the same report by selecting a button (an example of a control) on the monitor 50. Can be switched to.

As shown in FIG. 3, in the simulation report, the streak ratio may be shown together with the simulation images 301a to 301d. The streak ratio is derived as the maximum intensity distribution of PSF. The closer the stray ratio is to 1, the higher the contrast sensitivity and the smaller the aberration. By displaying the streak ratio, the examiner and the subject can quantitatively grasp the quality of the appearance.

In the simulation report, simulation information indicating how to see with the naked eye (hereinafter referred to as "naked eye simulation information"), simulation information indicating how to see in the corrected state (hereinafter referred to as "correction simulation information"), and May be displayed at the same time or by switching one by one. In FIG. 3, the naked eye simulation images 301a and 301b, which are examples of the naked eye simulation information, and the configuration simulation images 301c, 301d, which are examples of the correction simulation information, are displayed at the same time. By displaying both the naked eye simulation information and the correction simulation information, the examiner and the subject can easily grasp the improvement of the appearance by the spectacle lens.

<Correct lens power setting>
In the present device 1, at least the simulation information in the correction state with the new lens (the spectacle lens to be prescribed) is displayed as the correction simulation information. However, the present invention is not necessarily limited to this, and simulation information in the correction state of the old lens (the lens of the spectacles worn by the subject) may be further displayed as a kind of correction simulation information. The correction simulation information by the old lens and the correction simulation information by the new lens may be displayed at the same time, or may be switched and displayed one by one. By displaying both the correction simulation information by the old lens and the correction simulation information by the new lens, it is easy for the subject to grasp the effect of improving the appearance by the new lens. The correction power of the old lens may be acquired by the device 1 by transmitting measurement data from the lens meter that measured the old lens to the device 1, or the correction power may be input via the operation unit. May be done.

The correction simulation information with the new lens may indicate the appearance of the lens with the best visual acuity in the worn state. Usually, the spectacle lenses stocked in the optician store have a correction power in a predetermined power step (for example, for a spherical power, in a 0.25D step, etc.). Therefore, for example, among a plurality of predetermined dioptric powers in predetermined dioptric power steps (predetermined dioptric power steps), the dioptric power that gives the highest visual acuity to the eye to be inspected is the refraction information (for example, refraction value) of the eye to be inspected. , Refraction error distribution information, aberration information, etc.) may be selected. Then, the appearance corrected at the selected power may be shown in the correction simulation information with the new lens. When there are a plurality of powers that provide the best visual acuity, the power with the thinnest lens thickness among those powers may be selected as the power of the spectacle lens to be simulated. Of course, the present invention is not limited to this, and when there are a plurality of dioptric powers at which the maximum visual acuity can be obtained, the most positive dioptric power, the most negative dioptric power, and the like may be appropriately determined among those dioptric powers. Of course, the correction simulation information with the new lens is not necessarily limited to the simulation of the state corrected by the power in a predetermined power step. For example, the correction simulation information may indicate the appearance in which the low-order aberration component of the eye to be examined is completely corrected. In addition, as correction simulation information with the new lens, one showing the appearance corrected by the power in a predetermined power step and the one showing the appearance corrected with the low-order aberration component completely are simultaneously or It may be switched and displayed one by one.

As described above, in the present device 1, the power of the new lens in the simulation is automatically set based on the result of the aberration measurement by the optometry device. However, the power of the new lens may be changed from the automatically set value by the operation of the examiner. A new value may be reflected as the power of the new lens in the simulation by inputting an arbitrary power or an instruction to increase / decrease the power in predetermined power increments via the operation unit. Then, the simulation information may be updated based on the new value.

In the following description, the present device 1 calculates the corrected wavefront aberration data of the eye to be inspected assuming the prescription of the corrective lens having any correction power based on the naked eye wavefront aberration information, and further obtains the corrected wavefront aberration data. The explanation will be made assuming that the correction simulation information is acquired by the processing. For a more detailed calculation method of corrected wavefront aberration data, refer to, for example, International Publication No. WO2013 / 151171 by the applicant.

Further, in the simulation report in FIG. 3, graphs 302a and 302b showing contrast visual acuity are displayed as an example of simulation information. Contrast visual acuity may be derived based on MTF (spatial frequency characteristic). MTF is an absolute value of OTF (optical transfer function) obtained by Fourier transform of PSF. The contrast visual acuity in the naked eye state can be derived from the MTF based on the naked eye wave surface aberration data, and the contrast visual acuity in the corrected state can be derived from the MTF based on the corrected wave surface aberration data.

The graphs 302a and 302b may show the visual acuity value for each magnitude of contrast. For example, as shown in FIG. 3, one of the vertical axis and the horizontal axis may be the contrast value and the other may be the visual acuity value.

The graphs 302a and 302b simultaneously show data 311 showing the contrast visual acuity of the naked eye of the test eye, data 312 showing the contrast visual acuity in the corrected state, and data 313 showing the contrast visual acuity in the emmetropic eye. The data 313 showing the contrast visual acuity in the emmetropic eye is a reference value based on the measurement result of the contrast visual acuity for a plurality of subjects performed in advance. In FIG. 3, the data showing the contrast visual acuity in the emmetropic eye is derived from the measurement result for the subject whose refraction error is less than a predetermined power (for example, less than 0.5D) and belongs to a certain age.

In FIG. 3, each data 311, 312, 313 is represented in the form of a line graph.

All of these three types of data 311, 312, and 313 are displayed in one graph. According to the data 311 showing the contrast visual acuity of the eye to be inspected with the naked eye and the data 312 showing the contrast visual acuity in the corrected state, the examiner can determine the visual acuity for each magnitude of the contrast in the naked eye state and the corrected state. And can be easily understood by the subject. Also, they are compared with the data 313 showing the contrast visual acuity in the emmetropic eye. This is useful, for example, when the examiner proposes to the subject a prescription of a lens (for example, a color lens) having a function of improving contrast. In addition, when the contrast visual acuity is low, it is presumed that the intermediate translucent body becomes opaque and that the visual function is abnormal or deteriorated such as a decrease in the retinal function. Therefore, the graphs 302a and 302b allow the examiner and the subject to easily grasp whether or not there is a suspicion of abnormality or deterioration in visual function.

In FIG. 3, the visual acuity values corresponding to the targets shown as the simulation images 301a to 301d are highlighted in the graphs 302a and 302b of FIG. For example, in the graphs 302a and 302b, vertical lines are displayed at three places of the visual acuity values 20/100, 20/40, and 20/20, thereby emphasizing the visual acuity values.

Here, the data 312 showing the contrast visual acuity in the corrected state in the graphs 302a and 302b of FIG. 3 is simulated using the above-mentioned correction power in predetermined power increments. Since the contrast visual acuity when corrected with a lens stocked in an optician is simulated, it is easier to more preferably propose a lens having a function of improving the contrast.

In FIG. 3, the simulation images 301a to 301d and the graphs 302a and 302b in the daytime and the nighttime are displayed at the same time. If there is a significant difference between the daytime simulation information and the nighttime simulation information, each showing what the corrective lens (for daytime) looks like when prescribed. The examiner and the subject can easily understand that two types of eyeglasses should be prescribed, one for daytime and one for nighttime.

Further, in each of the simulation images 301a to 301d and the graphs 302a and 302b shown in FIG. 3, the correction power is set based on the information on the refraction of the entire eye to be inspected in the daytime, and the correction power is used. It is derived. That is, the simulation information when the corrective lens for daytime is worn is shown. However, the present invention is not limited to this, and simulation information when the correction lens for nighttime is worn may be shown in the simulation report. By displaying the simulation information when the corrective lens for nighttime is worn, the examiner and the subject can easily understand the significance of prescribing the lens for nighttime.

For the simulation information (for example, either a simulation image or a graph) when the correction lens for nighttime is worn, the correction power is set based on the information on the refraction of the entire eye to be inspected at night, and the correction power is set. Derived using. The simulation information when the corrective lens for daytime is worn and the simulation information when the corrective lens for nighttime is worn may be displayed at the same time or one by one by switching.

Further, the contrast value according to the wearing environment assumed in the new lens may be emphasized on the graphs 302a and 302b. With such graphs 302a and 302b, the examiner and the examinee can confirm the visual acuity value (contrast visual acuity) in the corrected state in the contrast according to the wearing environment assumed in the new lens.

For example, when it is assumed that the vehicle is being driven at night as the environment for wearing the new lens, the contrast value between the road obstacle or pedestrian at night and the background is shown on any of the graphs 302a and 302b. (For example, it is more preferable on the graph 302b showing the contrast visual acuity at night). As a result, the examiner and the examinee can grasp the visibility of obstacles and the like when driving the vehicle at night.

The wearing environment of the new lens may be selected from a plurality of wearing environments prepared in advance based on the operation input to the operation unit 35. As a result of the selection, the preset contrast values for the selected wearing environment are emphasized on the graphs 302a and 302b.

In the simulation report of FIG. 3, the simulation information for each eye is switched and displayed according to the operation of the left and right switching buttons 303a and 303b. However, the present invention is not limited to this, and simulation information of both eyes may be displayed at the same time.

<Eye report>
The eye map report is composed of an eye model image 401, information on the characteristics of the eye to be inspected, and one or both of simulation information. At least a part of the information about the characteristics of the eye to be inspected and the simulation information is displayed in association with the eyeball model image 401.

Here, information on the characteristics of the eye to be inspected and simulation information (for convenience, the two are collectively referred to as "eyeball optical system information and the like") and the mode of association with the eyeball model image 401 will be described more specifically. For example, the eyeball optical system information and the like are associated with the eyeball model image 401 by arranging the eyeball optical system information and the like related to the eyeball part in a state of being close to or superimposed on each eyeball part of the eyeball model image 401. May be done. The eyeball optical system information and the like related to a certain eyeball part may be, for example, information indicating any of a measurement result, an imaging result, and an image formation at the part of the eyeball part.

Further, for example, a symbol (for example, a line, an arrow, a balloon, etc.) indicating the correspondence between the eyeball optical system information and the corresponding portion may be used. In addition, when a selection operation for any part on the eyeball model image 401 by a pointing device or the like is accepted, the eyeball optical system information or the like corresponding to the selected part is highlighted (specific examples are enlarged display and blinking). Correspondence may be expressed by displaying, pop-up display, etc.).

For example, in the eyeball model image 401 in the eye view report shown in FIG. 4, the PSF images 402a and 402b showing the image formation of a point image on the cornea on the cornea are photographed images showing the opacity of the crystalline lens mainly on the crystalline lens. The illumination image 403 is associated with the anterior segment, the front reflection images 404a and 404b of the anterior segment are associated with the cornea, and the corneal curvature map 405 is associated with the cornea. Further, in FIG. 4, a cone-shaped graphic 406 showing a light flux reflected by the fundus and guided to the outside of the eye is depicted on the eyeball model image 401. This graphic 406 corresponds to the entire translucent body of the eye to be inspected. For example, the wavefront of the fundus reflected light can be easily recalled by the examiner or the like from the bottom surface portion (or cross section) of the cone outside the eyeball. As shown in FIG. 4, such a graphic 406 may be associated with, for example, refraction distribution maps 407a and 407b.

Further, in FIG. 4, the refractive index distribution maps 407a and 407b are relayed, and the graphic 406 is associated with the simulation images 408a and 408b showing how the optotype for the subjective examination is viewed. This makes it easier for the subject to intuitively understand the relationship between the appearance of the subject and the refraction distribution.

The associated display of the eyeball optical system information and the eyeball model image as described above makes it easier for the examiner to explain the meaning of the eyeball optical system information and the simulation information, which are unfamiliar to the subject, from the examiner to the subject.

In FIG. 4, among the various information displayed on the screen, regarding the information that changes between daytime and nighttime, both the value (data) in the daytime and the value (data) in the nighttime are displayed. Displayed at the same time. Specifically, the PSF images 402a and 402b, the specular reflection images 404a and 404b of the anterior segment of the eye, the refractive index distribution maps 407a and 407b, and the simulation images 408a and 408b of the optotype for subjective examination during the daytime and at nighttime. The data of each time is displayed at the same time. This makes it easy to compare and explain the difference in the state of each part of the eye between the daytime and the nighttime, or the difference in the appearance.

As the simulation information in the eye map report, the naked eye simulation information and the correction simulation information may be displayed at the same time or by switching one by one. In the example of FIG. 4, when one of the naked eye simulation selection button 409 and the correction simulation selection button 410 displayed on the monitor 50 is selected, the simulation information regarding the selected one is switched and displayed.

Further, in FIG. 4, a numerical value indicating a higher-order aberration component is displayed in association with the simulation information. When this numerical value is large, it is easy to explain from the examiner to the examinee that the eye to be inspected is difficult to obtain the effect of correction. In FIG. 4, both the numerical value at the time of daytime and the numerical value at nighttime are displayed. Therefore, when the difference between the value in the daytime and the value in the nighttime is large, the examiner finds that the aberration is large on the peripheral side of the cornea or the crystalline lens and it is difficult to improve the appearance at night. Easy to explain to others.

<How to switch each report>
It may be possible to switch the report displayed on the monitor 50 from any report displayed selectively to another arbitrary report. The display switching is executed based on one selection operation (for example, one click or one tap on the tabs and buttons on the monitor 50) for the control (for example, buttons, tabs, icons, etc.) on the monitor 50. May be good. For example, in this embodiment, the three reports and the corresponding report selection tabs 501, 502, and 503 are displayed on the monitor 50 together with each report. By inputting the selection operation for selecting any one tab, the report corresponding to the selected tab is displayed on the monitor 50. In the embodiment, the first tab 501 corresponds to the basic information report, the second tab 502 corresponds to the simulation report, and the third tab 503 corresponds to the eye view report.

In this embodiment, the selection operation of each tab 501, 502, 503 can be accepted in any of the reports, and the tab selected by the selection operation of one unit and the corresponding report are switched and displayed. The one-unit selection operation referred to here is the minimum operation for selecting a control, such as one click on the mouse and one tap on the touch panel.

On each tab 501 to 503, an icon symbolizing the report corresponding to each tab is displayed. The icon may be symbolized with a unique graphic in each report. For example, the second tab 502 is provided with an icon that symbolizes the simulation image of the objective for subjective examination that is displayed only in the simulation simulation report, and the third tab 503 is provided with only the eye view report. An icon in which the displayed eyeball model image is symbolized is provided. The first tab 501 is provided with an icon imitating a medical record in order to indicate that the basic information report is a report for examiners.

The arrangement order of the tabs 501 to 503 may be arbitrarily changed by the operation of the operation unit. For example, the examiner may select one of the tabs 501 to 503 via the pointing device and drag it up or down to set the arrangement order according to the drag. For example, by rearranging the tabs in the order in which the examiner or the examinee browses, it becomes easy to browse each report and explain from the examiner to the subject.

<Data output>
In this embodiment, data is output to the outside of the apparatus 1 by selecting the output buttons 601, 602 displayed in each report.

Button 601 is selected to send data to the optometry device. Button 601 has an icon that imitates a subjective optometry device (refractor). In this embodiment, when the button 601 is selected, at least the WF lev value is transmitted from the device 1 to the subjective optometry device. Not limited to this, simulation information such as a simulation image may be transmitted when the button 601 is selected. Further, the data transmitted to the optometry device based on the operation of the button 601 may be data in the daytime or data in the nighttime. The examiner may be able to select which of these is transmitted.

The button 602 is selected when printing out each report.

As described above, in the present device 1, three types of "basic information report", "simulation report", and "eye view report" are selectively displayed on the monitor 50. Since the basic information report is a collection of various information used in lens prescription, it is used by the examiner to perform a subjective test and to determine a prescription value for a new lens. In addition, the simulation report is a collection of simulation information and includes at least a simulation image showing how the eye to be examined looks in the corrected state. As a result, the examiner and the examinee can grasp the appearance of the eye to be inspected in the corrected state by the new lens. In addition, the eye map report is at least a part of the information included in the basic information report, and the information that affects the appearance in the correction simulation image is displayed in association with each part in the eye map model image. .. As a result, when a clear simulation image as a correction simulation image is not shown in the simulation report, the examiner tells the subject what kind of factor (eyeball optical system information) is caused. Easy to explain. As described above, the three types of reports displayed by the present device 1 are useful for properly showing the effect of the new lens to the subject and for the examiner to prescribe the new lens.

Although the above description has been made based on the embodiment, the present disclosure is not limited to the above embodiment, and various modifications can be made.

For example, in the above embodiment, three reports, a basic information report, a simulation report, and an eye view report, can be selectively displayed, but the present invention is not always limited to this.

For example, the report may be selectively displayable between only two reports, the basic information report and the eye view report. In this case, the eye view report also serves as a simulation report in the above embodiment, and preferably includes at least correction simulation information. Furthermore, in the eye map report, at least a part of the information on the characteristics of the eye to be inspected that affects the appearance based on the correction simulation information is displayed in association with each eyeball part in the eyeball model image. Is preferable. In such transformational cases, it is easier to suitably prescribe corrective lenses with a smaller number of reports. On the other hand, as shown in the above embodiment, since there are various types of simulation information, the screen configuration of a report containing various simulation information tends to be complicated, but in the above embodiment, this is independent. Each report is easy to understand because it is displayed in the report (as a separate report from the basic information report and the eye view report).

Further, for example, as simulation information indicating how the eye to be examined looks in the corrected state, simulation information when "cloudiness" occurs in the corrected lens may be displayed. By performing the simulation calculation in consideration of a predetermined aberration according to the degree of "cloudiness" to be simulated, simulation information when "cloudiness" occurs may be acquired.

1 Lens prescription assisting device 30 CPU
31 Storage unit (memory)
50 monitors

Claims (5)

By running on the computer's processor
The acquisition step of acquiring the naked eye wavefront aberration data of the eye to be inspected measured by the wavefront sensor ,
The corrected wave surface aberration data of the eye to be inspected assuming the prescription of a corrective lens having one of a plurality of predetermined correction powers in a predetermined power step is calculated based on the naked eye wave surface aberration data, and further, the corrected wave surface aberration is calculated. A calculation step for obtaining the corrected contrast visual acuity, which is the contrast visual acuity of the subject eye reflecting the correction power from the spatial frequency characteristics based on the data, for each magnitude of the contrast.
A display control step that displays information indicating the corrected contrast visual acuity for each contrast magnitude on the monitor , and
A lens prescription auxiliary program that causes the computer to execute. A selection step of selecting the corrective power of the corrective lens according to the values of S, C, and A based on the naked eye wavefront aberration data is further executed.
The lens prescription assisting program according to claim 1 , wherein in the calculation step, the corrected wavefront aberration data and the corrected contrast visual acuity are acquired based on the selected corrective power. In the calculation step, the naked eye contrast visual acuity in the eye to be inspected is further obtained for each of a plurality of different contrast values from the spatial frequency characteristics based on the naked eye wavefront aberration data.
The lens formulation according to claim 1 or 2, wherein in the display control step, information indicating the corrected contrast visual acuity for each magnitude of contrast and information indicating the naked eye contrast visual acuity for each magnitude of contrast are displayed on a monitor. Auxiliary program . In the display control step, the information indicating the corrected contrast visual acuity for each magnitude of contrast and the information indicating the contrast visual acuity for the emmetropic eye, which is the contrast visual acuity for the emmetropic eye for each magnitude of contrast, are displayed on the monitor. Item 4. The lens prescription auxiliary program according to any one of Items 1 to 3. The lens according to any one of claims 1 to 4, wherein in the display control step, information indicating the corrected contrast visual acuity for each magnitude of contrast is represented by a graph centered on the magnitude of contrast and the visual acuity value. Prescription assistance program.